stats: better naming of template parameters for the wrapper stuff Parent and Child are bad names.  Derived and Base are better.
stats: better naming of template parameters for the wrapper stuff
Parent and Child are bad names.  Derived and Base are better.

andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin,andrewfu0325/gem5-aladdin